Best SDR & Lead Gen Services Tools (2025)

The Munro Agency is a Glasgow-based B2B digital marketing and lead generation agency that combines PPC, SEO, marketing automation and AI-powered tools to deliver sales-ready leads. They serve growth-focused SaaS, technology and professional services companies across the UK and internationally.

The Pipeline Group (TPG) is a technology-enabled, outsourced SDR-as-a-Service provider that helps B2B technology companies build predictable sales pipeline using AI-augmented SDR teams, deep data, and a full go-to-market tech stack.

The Telemarketing Company (TTMC) is a UK-based B2B telemarketing and inside sales agency providing outsourced SDRs, lead generation, appointment setting, inbound lead management, data services and telephone research for organisations worldwide.([ttmc.co.uk](https://ttmc.co.uk/about-us?utm_source=openai))

Trellus is an AI-powered parallel dialer and real-time sales coach for SDR and outbound teams, delivered as a Chrome extension that layers onto existing CRMs and sales engagement platforms.([ycombinator.com](https://www.ycombinator.com/companies/trellus))

UnboundB2B is a global B2B demand generation and lead generation agency that helps enterprise and high-growth SaaS companies build qualified pipeline and shorten sales cycles with AI-powered, pay-for-performance programs.

Uplift Sales (now operating as UpliftGTM) is an outsourced SDR and lead generation agency that builds predictable sales pipelines for B2B technology companies across ANZ, the UK, and beyond.

Utmost Agency is an Amsterdam-based outbound sales and lead generation agency that builds Clay- and AI-powered automation systems to generate predictable pipelines of qualified B2B meetings.

Valve+Meter is a performance marketing agency that combines data-driven strategy, outbound lead generation, and full-funnel digital marketing to drive measurable revenue growth.

VSA Prospecting is a U.S.-based B2B call center and lead generation firm specializing in outbound appointment setting, inbound customer service, and inside sales for complex offerings.

Whistle is a global SDR and lead generation agency that builds and runs multi-channel outbound and inbound sales development programs for B2B companies.

Zevenue is a Toronto-based GTM outbound and lead generation agency that builds and runs research-driven outbound engines for B2B startups.